Plunger for tile-machines.



- PATENTED 00T. 22. 1907.

G. P. KEIL. PLUNGER PoR TILE MACHINES.y

APPLICATION FILED APR29,1907.

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UNITED STATES;

PATENT oEEIoE.

GEORGE F. IililL, OF SIIERBURN, MINNESOTA, ASSIGNOR OF ONE-HALF TO CHRISTIAN F.

MIGKELSON, OF SHERBURN, MINNESOTA.

PLUNGER FOR TILE-MACHINES.

Patented oct. 22, 1907.

Application filed April 29,1907. Serial No. 370,950.

To all whom 'it may concern:

lie it known that I, GEORGE F. KEIL, a citizen of the United-States, residing at Sherburn, in the county 0f Martin and State of Minnesota, have invented certain new and useful improvements in Plungers for Tile- Machines; and I do hereby declare the following to be a'full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an mproved plunger or presser head for tile making machines wherein concrete or other plastic tile forming material is pressed within a cylindrical shell or casing by a spiral, that is, combined endwise and rotary Inovelnent of the plunger or presser head.

To the above ends the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

A machine of th o general character above outlined is disclosed in U. S. Letters Patent No. 819,931, issued of dateMayS, 19061.() .lohn M. Schenk and Joseph Schenk and entitled Tile machine. The plunger or presser head employed in that machine is made of cast iron and is in the form of an inverted bell or hollow shell having cavities and cam acting surfaces in its opposite sides. Plungers thus constructed of cast iron wear out very rapidly; in fact, under ordinarily hard usuage such cast iron plunger will usually last less than one day.

M y invention has for its object to increase the working life of a plunger' or presser head ol' the character above specified, and this is accomplished by the provision of detachable hardened wearing blocks and follower ring, preferably constructed of hardened steel and capable of adjustments to compensate for wear.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to thc drawings, Figure l is aview in side ele vation, showing the improved plunger or presser head. Fig. 2 a vertical section taken through the plunger on the line ai of Fig. 4. Fig. 3 is an enlarged horizontal section taken on the line 3:3 .t3 of Fig. l. Fig. 4 is an enlarged section taken on the line .r1 x4 of Fig. l.; and Fig. 5 is an elevation, looking at the improved plunger at an angl o of ninety degrees from the direction in which is viewed in Fig. l.

The body of the hollow plunger or presser head l is usually of cast iron and is provided at its contracted upper end with a threaded sleeve 2 to which the usual plunger stem may be applied in the customary way. The lower portion of this plunger is of cylindrical form and in its sides above this portion it is formed with cavities 3 that arov adapted to become filled with the concrete from which the tile is to be formed under spiral motion of the plunger within the mold or cylindrical casing (not shown). At their lower portions, these pockets 3 merge into the upper cylindrical portion of the plunger l, and at these points hard ened steel Wearing plates 4 are countersunk into suitable seats therefor in the body of said hollow head. These wearing plates 4 are provided with threaded stems 5 that project through the walls and into the interior of the plungerll, and are provided with clamping nuts 6. These hardcned wearing plates 4i are thus placed where the greatest wear comes under the spiral or combined endwise and rotary movement of the plunger, and they therefore in themselves greatly increase the life of the plunger. Furthermore, when they are worn down, suitable pack ing strips may be placed between the backs thereof and the cooperating seats in the plunger, so as to thereby set the said wearing plates outward and thus compensate for wear.

The cylindrical lower portion of the plunger or presser head acts as a follower to smooth and maintain the interior surfaces of the tile which is being formed by the plunger, and this portion is also subject to very great l wear. Hence, in further accordance with my invention, I slightly reduce the cylindrical lower end of the said plunger and place around the same a hard tempered steel ring 7 which is split or cut obliquely at 8. This follower ring 7 is preferably secured to the body of the plunger l by nutted bolts 9, the heads of which are countersunk into said ring. When the follower ring is worn considerably, a suitable annular packing may be placed between the same and the body of the head l, to increase the exterior diameter of the said ring and thus compensate for wearing away thereof, and to permit this adjustment the passages in the walls of the plunger, for the bolts 9, should be circumferentially elongated. As shown, the follower ring 7 is provided near its ends with perforations l0 into which a suitable tool may be-inserted for the purpose of expanding the said ring when the bolts 9 are loosened.

As is evident, the novel devices above described serve to very greatly increase the working life of the plunger or presser head. The importance of this feal ture will be readily appreciated by all persons familiar with the working of a device of this kind.

What I claim is:

l. A plunger or presser head of the kind described, having; a `detachable and adjustahlefollewer ring applied to the lower end .portion thereof and having one or more cavities above said packing ring that join the exterior surface of said plunger or head by gradually curved lines in one direction, substantially as described.

2.' The combination with a plunger or presser head 1 havingl the cavities 3 in its sides, of a hard metal follower ring detachably and adjustably applied around the lower end portion of said plunger or head, and detachable hard said plunger or head, and at which points the greatest l of said plunger or head 1, said ring being cut at 8, and 10 wear takes place, substantially as described.

3. The combination with a hollow plunger head l having the pockets 3, of the detachable hard metal wearing plates 4 set into said plunger or head at points where the lower portions of said pockets 3 join the external surface of said plunger or head, and at which points the greatest wear takes place, the hard metal follower ring 7 detachably and adjustably applied around the lower end portion nutted bolts adjustably securing said follower ring to said plunger, substantially as described.

ln testimony whereof I atx my signature in presence of two witnesses.

GEORGE F. KEIL.

Witnesses z A. C. MILLER, W. F. BRUNDAGE. 

